Device to facilitate stripping articles from vulcanizing molds



D. E. HENNESSY DEVICE TO FACILITATE STRIPPING ARTICLES FROM VULGANIZINGMOLDS Filed April 28, 1922 .DA N/EL. E. HEN/V Patented Jan. 13, 1925.

DANIEL E, HENNESSY, 0F MILWAUKEE, WISCONSIN, ASSIQNOB, TO THE FISKRUBBER COMPANY, OF CHICOPEE FALLS, MASSACHUSETTS, A CORPORATION OFMASSA- CHUSETTS.

DEVICE TO FACILITATE STRIPPING ARTICLES FROM VULCANIZING MOLDS.

Application filed Apri1'28,1922. Serial No. 557,205.

companying this specification and forming a part thereof I have shownfor purposes of illustration, one form which my invention may assume. Inthese drawings:

Figure 1 is a fragmentary section through a tire mold embodying thisillustrative form of my invention, while 5 Figure 2 is a detail-showingparts in a second position.

The embodiment herein disclosed is shown as applied to a tiremold 11 andcomprises a cylindrical plug 12 seated in a recess 13 in the mold 11 andprovided with a duct 14 opening at the top into a screw threaded socket15 and arranged at the-bottom eccentrically of the plug 12 and such adiscertain of the align, upon rotation of the plug 12, with acooperating duct 16 leading from the bottom of the recess 13 to theinterior of the mold 11. The plug 12 may be. provided with any suitablemeans whereby it may be ro-. tated, such, for example, as" the hexagonhead'l'? herein shown.

During curing the plug is positioned as shown in Figure 1 to'prevent anyescape of rubber through the duct. When it is desired to remove the tirethe plug is rotated to align the ducts 14 and 16 to providecommunication from the exterior to the inner surface of the mold andthus permit the entrance of air into "the space formed between i thetire and the mold as the tire is removed to thus. destroy the vacuumwhich normally exists in that space and materially resists the removalof the tire. 1

Under certain circumstances it may be desirable to do more than merelydestroy the vacuum and in such cases a fluid pressure conduit may beconnected to the socket 15 and fluid under pressure forced between thetire and'the mold to thus positively eject the tire from the mold.

A plurality of plugs may be employed to more effectively accomplish theresult desired and the plugs may vary from that herein shown. The entiredisclosure herein is illustrative only and my invention is not limitedthereto.

I claim? 1. In a the mold a rotatable plug controlling by its rotation apassage from the interior to the exterior of said mold.

2. In a tire mold,.a recess communicating with the interior of saidmold, a rotatable plug, )rovided' with a duct, in said recess anda aptedupon rotation to open and close a passage from the interior to theexterior tance from the axis of the plug 12 as to of said mold,

3. A tire mold as in claim 4, said duct terminating exteriorly in asocket.

4:. In a tire mold, a recess communicating with the interior of saidmold, a rotatable plug controlling by its rotation a passage from theinterior to the exterior of said mold, and means lying below theexterior surface of said mold, to rotate said plug.

In testimony whereof I have signed my name to the above specification.

DANIEL EL HENNESSY.

